"He had been splashing in the shallow end until the shrill sound of the lifeguard's whistle cut through the air like a siren."

4. In this sentence, the whistle most likely symbolizes (1 point)
• danger
O embarrassment
• power
temptation

The whistle in this sentence most likely symbolizes danger.

In this sentence, the whistle most likely symbolizes danger, as it is described as a shrill sound that cuts through the air like a siren.